Transcript for United Airlines Flight Diverted After Emergency Slide Deploys

We began with a frightening flight for dozens of passengers aboard -- united jet shortly after taking off from Chicago this happened. An emergency evacuation slide opening in the back of the plane. Passengers most of these images of the slide locking -- -- the pilot declared an emergency and -- ended the Southern California bound plane. In Wichita Kansas were emergency crews were waiting. We heard a little bit of pop and -- the stewardesses running -- on the -- we -- looked in the back. We -- the emergency slides had deployed and landed them. -- And than some -- People in the Hazmat suits look like -- basically everyone's just looking around leaders warning -- this plane was okay and you know for -- a little -- what was gonna happen. ABC aviation analyst John -- calls this unusual and very very rare. But not the first time a slide inflated on a jetBlue flight from Fort Myers to Boston back in November. Pinning the flight -- the united plane will be examined to try to figure out what went wrong the Orange County bound passengers are staying in Wichita overnight.

This transcript has been automatically generated and may not be 100% accurate.

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